Au 3 Cu nanosquares and frames for glucose sensor and CO oxidation catalyst
- PDF / 1,529,060 Bytes
- 7 Pages / 595.276 x 790.866 pts Page_size
- 67 Downloads / 148 Views
Au3Cu nanosquares and frames for glucose sensor and CO oxidation catalyst Peipei Li1 · Xinsheng Peng1 Received: 22 April 2020 / Accepted: 5 June 2020 © Springer-Verlag GmbH Germany, part of Springer Nature 2020
Abstract Au–Cu bimetallic nanomaterials have attracted tremendous attention in the field of catalysis, water splitting, biosensor and biotherapy. Au3Cu nanocrystals with a definite stoichiometric ratio and ordered arrangement of atoms have shown great potential for efficient catalyts. Herein, we reported a new method for fabrication of Au3Cu nanocrystals. Their morphologies can be tuned by the amount of hydrochloric aqueous solution, including nanosquare and frame were achieved, respectively. The as-synthesized A u3Cu nanosquares not only demonstrated a comparatively high sensitivity of 324.8 μA mM−1 cm−2 as a non-enzymatic glucose sensor but also performed well in CO catalytic oxidation even at 50 °C with a conversion efficiency of 30 mmol g−1 h−1. Keywords Bimetallic nanomaterials · Au3Cu nanoframes and squares · Glucose sensor · CO catalytic oxidation
1 Introduction In recent years, there has been a research tendency toward bimetallic nanomaterials, since the synergistic effect between two component metals made them emerging materials for a variety of applications, including catalysis [1], sensing [2], magnetism [3] and so on [4]. As one branch of these bimetallic nanomaterials, Au–Cu bimetallic nanomaterials have drawn more attention due to their model bimetallic system and noble-non-noble alloy composition. Typically, there are two kinds of Au–Cu bimetallic nanomaterials: disordered Au–Cu nanostructures and structurally ordered intermetallic Au–Cu nanocrystals. Disordered Au–Cu nanostructures, especially nanoparticles proved to perform better than Au nanostructures in water splitting [5, 6], catalytic CO2 reduction [7, 8] and surface-enhanced Raman scattering [4]. On the other hand, ordered intermetallic Au–Cu nanocrystals, like A u3Cu with a definite stoichiometric ratio Electronic supplementary material The online version of this article (https://doi.org/10.1007/s00339-020-03707-y) contains supplementary material, which is available to authorized users. * Xinsheng Peng [email protected] 1
State Key Laboratory of Silicon Materials, School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China
which we focus on in this paper, also dramatically exhibit excellent properties in the field of catalyst [9], biosensor [10] and biotherapy [11]. There were a good deal of reports on the preparation and properties of disordered Au–Cu nanostructures, forming a relatively mature fabrication and characterization system [8, 12–14]. However, the successful preparation of structurally ordered intermetallic phase Au3Cu was few. A phase-stabilized process has been reported to prepare Au3Cu truncated nanocubes with high catalytic activities for CO2 electroreduction [15]. Kim et al. synthesized surfactant-free Au3Cu single-crystal nanowires via a vapor-phase process f
Data Loading...
